ST62T08C_99 Datasheet, PDF (11/70 Pages) STMicroelectronics – 8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, OSCILLATOR SAFEGUARD, SAFE RESET AND 20 PINS

ST62T08C/T09C ST62T10C/T20C/E20C
PROGRAMMING MODES (Cont’d)
1.4.2 Program Memory
EPROM/OTP programming mode is set by a
+12.5V voltage applied to the TEST/V_PP pin. The
programming
flow
of
the
ST62T08C,T09C,T10C,T20C/E20C is described
in the User Manual of the EPROM Programming
Board.
Table 2. ST62T08C, T09C Program Memory Map
Device Address
0000h-0B9Fh
0BA0h-0F9Fh
0FA0h-0FEFh
0FF0h-0FF7h
0FF8h-0FFBh
0FFCh-0FFDh
0FFEh-0FFF h
Description
Reserved
User ROM
Reserved
Interrupt Vectors
Reserved
NMI Interrupt Vector
Reset Vector
Table 3. ST62T10C Program Memory Map
Device Address
0000h-087Fh
0880h-0F9Fh
0FA0h-0FEFh
0FF0h-0FF7h
0FF8h-0FFBh
0FFCh-0FFDh
0FFEh-0FFF h
Description
Reserved
User ROM
Reserved
Interrupt Vectors
Reserved
NMI Interrupt Vector
Reset Vector
Table 4. ST62T20C,E20C Program Memory Map
Device Address
0000h-007Fh
0080h-0F9Fh
0FA0h-0FEFh
0FF0h-0FF7h
0FF8h-0FFBh
0FFCh-0FFDh
0FFEh-0FFFh
Descriptio n
Reserved
User ROM
Reserved
Interrupt Vectors
Reserved
NMI Interrupt Vector
Reset Vector
Note: OTP/EPROM devices can be programmed
with the development tools available from STMi-
croelectronics (ST62E2X-EPB or ST622X-KIT).
1.4.3 EPROM Erasing
The EPROM of the windowed package of the
MCUs may be erased by exposure to Ultra Violet
light. The erasure characteristic of the MCUs is
such that erasure begins when the memory is ex-
posed to light with a wave lengths shorter than ap-
proximately 4000Å. It should be noted that sun-
lights and some types of fluorescent lamps have
wavelengths in the range 3000-4000Å.
It is thus recommended that the window of the
MCUs packages be covered by an opaque label to
prevent unintentional erasure problems when test-
ing the application in such an environment.
The recommended erasure procedure of the
MCUs EPROM is the exposure to short wave ul-
traviolet light which have a wave-length 2537A.
The integrated dose (i.e. U.V. intensity x exposure
time) for erasure should be a minimum of 30W-
sec/cm². The erasure time with this dosage is ap-
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